package com.kylin.pc;

//测试：生产者消费者模型-->利用缓冲区解决:管程法

//生产者，消费者，产品，缓冲区
public class TestPC {

    public static void main(String[] args) {
        SynContainer container = new SynContainer();

        new Product(container).start();
        new Consumer(container).start();
    }
}

//生产者
class Product extends Thread {
    SynContainer container;

    public Product (SynContainer container){
        this.container=container;
    }

    //生产
    @Override
    public void run() {
        for (int i = 0; i < 100; i++) {
            container.push(new Chicken(i));
            System.out.println("生产了"+1+"只鸡");
        }
    }
}

//消费者
class Consumer extends Thread {

    SynContainer container;

    public Consumer (SynContainer container){
        this.container=container;
    }

    //消费
    @Override
    public void run() {
        for (int i = 0; i < 100; i++) {
            Chicken chicken = container.pop();
            System.out.println("消费了"+1+"只鸡");
        }
    }
}

//产品
class Chicken {
    int id;//产品编号

    public Chicken(int id) {
        this.id = id;
    }
}

//缓冲区
class SynContainer {

    //需要一个容器大小
    Chicken[] chickens = new Chicken[10];
    //容器计数器
    int count = 0;

    //生产者放入产品
    public synchronized void push(Chicken chicken) {
        //如果容器满了，就需要等待消费者消费
        if (count == chickens.length) {
            //通知消费者消费，生产等待
            try {
                this.wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        //如果没有满，我们就需要丢入产品
        chickens[count] = chicken;
        count++;

        //可以通知消费者消费了
        this.notifyAll();
    }

    //消费者消费产品
    public synchronized Chicken pop(){
        //判断是否能消费，缓冲区为空
        if (count==0){
            //等待生产者生产
            try {
                this.wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        //可以消费,缓冲区不为空
        count--;//count=10。数组下标最大为
        Chicken chicken = chickens[count];


        //吃完了，通知生产者生产
        this.notifyAll();

        return chicken;
    }
}
